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Axial compressor

About: Axial compressor is a research topic. Over the lifetime, 12035 publications have been published within this topic receiving 127766 citations.


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Patent
27 Apr 2004
TL;DR: In this article, a variable capacity scroll compressor is proposed, where a high-pressure fluid within a thermodynamic cycle is introduced into the inside of the compressor to increase the compression volume and also the fluid inhaled/exhausted from the compressor allows the fluid being compressed to be bypassed in multi-stages.
Abstract: Disclosed is a variable capacity scroll compressor in which a high-pressure fluid within a thermodynamic cycle is introduced into the inside of the compressor to increase the compression volume and also the fluid inhaled/exhausted from the compressor allows the fluid being compressed to be bypassed in multi-stages, thereby varying the capacity of the compression fluid.

49 citations

Journal ArticleDOI
TL;DR: In this article, the unsteady stator incidence angles have been found to have a peak-to-peak variation of between 12 deg and 15 deg for all flow coefficients tested.
Abstract: Turbulence and unsteadiness levels downstream of an axial-flow compressor rotor have been measured using an ensemble-averaging technique. Free-stream turbulence levels are lowest near the compressor design-point, and increase with decreasing flow coefficient as the compressor nears the stalled condition. The unsteady stator incidence angles have been found to have a peak-to-peak variation of between 12 deg and 15 deg for all flow coefficients tested. These observations have been confirmed qualitatively by hot-wire-anemometer spectral measurements.

48 citations

Proceedings ArticleDOI
11 Jun 1990
TL;DR: In this paper, the authors used temporally and spatially resolved measurements to study the evolution of rotating stall cells in low speed compressors and high speed three-stage compressors.
Abstract: Stall inception has been studied in two low speed compressors (a single-stage and a three-stage) and in a high speed three-stage compressor, using temporally and spatially resolved measurements. In all three machines, rotating stall was preceded by a period in which small amplitude waves were observed travelling around the circumference of the machine at a speed slightly less than the fully developed rotating stall cell speed. The waves evolved smoothly into rotating stall without sharp changes in phase or amplitude, implying that, in the machines tested, the prestall waves and the fully developed rotating stall are two stages of the same phenomenon. The growth rate of these disturbances was in accord with that predicted by current analytical models. The prestall waves were observed both with uniform and with distorted inflow, but were most readily discerned with uniform inflow. Engineering uses and limitations of these waves are discussed.Copyright © 1990 by ASME

48 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of the magnetic field on the axi-symmetric flow in the vicinity of a constantly rotating infinite disk in the presence of a uniform magnetic field is considered.
Abstract: Magnetohydrodynamic flow of an electrically conducting power-law fluid in the vicinity of a constantly rotating infinite disk in the presence of a uniform magnetic field is considered. The steady, laminar and axi-symmetric flow is driven solely by the rotating disk, and the incompressible fluid obeys the inelastic Ostwald de Waele power-law model. The three-dimensional boundary layer equations transform exactly into a set of ordinary differential equations in a generalized similarity variable. These ODEs are solved numerically for values of the magnetic parameter m up to 4.0. The effect of the magnetic field is to reduce, and eventually suppress, the radially directed outflow. An accompanying reduction of the axial flow towards the disk is observed, together with a thinning of the boundary layer adjacent to the disk, thereby increasing the torque required to maintain rotation of the disk at the prescribed angular velocity. The influence of the magnetic field is more pronounced for shear-thinning than for shear-thickening fluids.

48 citations

Patent
Kazuki Takahashi1, Haruo Miura1, Hideo Nishida1, Naohiko Takahashi1, Yasuo Fukushima1 
13 Feb 1998
TL;DR: In this article, a low pressure-side first-stage compressor impeller and a high-pressure-side second-stage impeller are mounted respectively on opposite ends of a rotation shaft.
Abstract: A low pressure-side first-stage compressor impeller and a high pressure-side second-stage compressor impeller are mounted respectively on opposite ends of a rotation shaft. A rotor of an electric motor for driving the two impellers is formed at a central portion of the rotation shaft. A stator of the motor is held by a motor casing. The motor casing, a first-stage compressor casing, which cooperates with the first-stage compressor impeller to form a first-stage compressor, and a second-stage compressor casing, which cooperates with the second-stage compressor impeller to form a second-stage compressor, are cast into an integral construction. This integral casing is further formed integrally with an intermediate cooler, disposed downstream of the first-stage compressor, and a discharge cooler disposed downstream of the second-stage compressor. The intermediate cooler and the discharge cooler are disposed below the motor casing in generally parallel relation to the rotation shaft, and the main portions of the two-stage centrifugal compressor are combined into a compact, generally rectangular parallelepiped configuration.

48 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202398
2022304
2021217
2020288
2019316
2018353